Lonnie,
You could always mention that you read on the thread that one wife washes and waxes the sides of the Montana with her husband after he cleans the roof. I am the one that suggests that the roof needs to be cleaned. I started saying that after I had scrubbed the sides and only have the dirt on the roof leave black streaks when we had a heavy rain. Your DW might not suggest that you wash the roof so often if she is out helping you scrub the Monty
Colleen